code: def read_output(cmd, verbose=True):
      cmd = cmd.replace("VW", VW)
      if verbose:
          sys.stderr.write("+ %s\n" % cmd)
      p = os.popen(cmd)
      out = p.read()
      if p.close():
          sys.exit(1)
      return out
  
file_path: vowpal_wabbit/test/save_resume_test.py
imports: import sys
  import os
  import optparse
  import random
  from itertools import zip_longest
label_desc: Use image node_id 2 for calling a global function with example usage: read_output(cmd, verbose) and returns: out